PHOTOS: Suicide attacks in Kabul

An Afghan security guard talks to colleagues at a guest house after an attack in Kabul, Afghanistan, on Wednesday. Gunmen attacked the guest house used by U.N. staff in the Afghan capital city, officials said. A Taliban spokesman claimed responsibility, saying it was meant as an assault on the upcoming presidential election. (Musadeq Sadeq / Associated Press)

Sept. 16, 2014 5:43 PM PT

Afghan security officials secure the scene of a gun battle with Taliban militants in Kabul, Afghanistan. Six U.N. workers were killed Wednesday when an explosion rocked a guest house and armed attackers burst in. (S. Sabawoon / EPA)

An Afghan police officer carries an injured unidentified German national as smoke billows from the site of the attack in Kabul, Afghanistan, on Wednesday. (Gemunu Amarasinghe / Associated Press)

Afghan police officers and soldiers surround a body outside the U.N. guest house. (Altaf Qadri / Associated Press)

An Afghan security guard at the scene of a suicide bomb attack on an international guest house in Kabul, Afghanistan. Taliban militants killed six U.N. foreign staff in the early morning assault, raising serious issues about security before the presidential runoff election in less than two weeks’ time. Rockets were also fired at the Serena hotel, but no injuries were reported. (Paula Bronstein / Getty Images)

Afghan security personnel at the site of an attack on a guest house for U.N. staff. (Musadeq Sadeq / Associated Press)

Smoke billows from the scene of a suicide bomb attack on an international guest house on Wednesday in Kabul, Afghanistan. (Paula Bronstein / Getty Images)

An Afghan policeman looks out from the gate of the guest house after it was attacked. (Musadeq Sadeq / Associated Press)